<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Log
 * @subpackage Formatter
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Xml.php 16219 2009-06-21 19:45:39Z thomas $
 */

/** Zend_Log_Formatter_Interface */
require_once 'Zend/Log/Formatter/Interface.php';

/**
 * @category   Zend
 * @package    Zend_Log
 * @subpackage Formatter
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Xml.php 16219 2009-06-21 19:45:39Z thomas $
 */
class Zend_Log_Formatter_Xml implements Zend_Log_Formatter_Interface
{
	/**
	 * @var Relates XML elements to log data field keys.
	 */
	protected $_rootElement;

	/**
	 * @var Relates XML elements to log data field keys.
	 */
	protected $_elementMap;

	/**
	 * Class constructor
	 *
	 * @param array $elementMap
	 */
	public function __construct($rootElement = 'logEntry', $elementMap = null)
	{
		$this->_rootElement = $rootElement;
		$this->_elementMap  = $elementMap;
	}

	/**
	 * Formats data into a single line to be written by the writer.
	 *
	 * @param  array    $event    event data
	 * @return string             formatted line to write to the log
	 */
	public function format($event)
	{
		if ($this->_elementMap === null) {
			$dataToInsert = $event;
		} else {
			$dataToInsert = array();
			foreach ($this->_elementMap as $elementName => $fieldKey) {
				$dataToInsert[$elementName] = $event[$fieldKey];
			}
		}

		$dom = new DOMDocument();
		$elt = $dom->appendChild(new DOMElement($this->_rootElement));

		foreach ($dataToInsert as $key => $value) {
			if($key == "message") {
				$value = htmlspecialchars($value);
			}
			$elt->appendChild(new DOMElement($key, $value));
		}

		$xml = $dom->saveXML();
		$xml = preg_replace('/<\?xml version="1.0"( encoding="[^\"]*")?\?>\n/u', '', $xml);

		return $xml . PHP_EOL;
	}

}
